Tractor



FIG. 1 is a front-side perspective view of a tractor embodying our new design;

FIG. 2 is a rear-side perspective view of the tractor;

FIG. 3 is a left side view of the tractor;

FIG. 4 is a right side view of the tractor;

FIG. 5 is a top plan view of the tractor;

FIG. 6 is a bottom view of the tractor;

FIG. 7 is a front view of the tractor; and,

FIG. 8 is a rear view of the tractor. 

We claim the ornamental design for a tractor, as shown and described. 